Silphium asteriscus, commonly called starry rosinweed,[2] is an herbaceous plant in the family Asteraceae. It is native to the eastern United States, from Oklahoma and Texas east to Florida and Pennsylvania.[3] It is a widespread species found in a variety of open habitats, such as prairies and woodlands.[4]
| Silphium asteriscus | |
|---|---|
| |
| Silphium asteriscus var. asteriscus | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Silphium |
| Species: | S. asteriscus
|
| Binomial name | |
| Silphium asteriscus | |
Taxonomy
editAdditional research is needed to better understand the taxonomy of this species. It remains perhaps the most poorly-understood Silphium in eastern North America.[5] It appears to show a high level of local variability throughout its range, which has been interpreted as either a species complex, a single highly variable species, or some combination of both. Due to conflicting information about the best circumscription of the varieties, the taxonomy of this species remains unsettled.[6][7]
The most recent treatment from 2020 ranked Silphium asperrimum, Silphium dentatum and Silphium simpsonii at species status.[7] If adopted, this leaves S. asteriscus with three remaining varieties. They are:
- Silphium asteriscus var. asteriscus - Appalachian and eastward; with a congested, hispid inflorescence
- Silphium asteriscus var. laitoflium - south and west of the Appalachians; with broad, opposite leaves and a spreading glabrous inflorescence
- Silphium asteriscus var. trifoliatum - widespread; similar to the above but with narrow whorled leaves[7]
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Line drawing of Silphium asteriscus
References
edit- ^ "Silphium". Index Nominum Genericorum. International Association for Plant Taxonomy. 9 February 1996. Retrieved 24 June 2008.
- ^ USDA, NRCS (n.d.). "Silphium asteriscus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 18 January 2017.
- ^ "Silphium asteriscus". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014. Retrieved 18 January 2017.
- ^ Flora of North America
- ^ Chester, Edward (2015). Guide to the Vascular Plants of Tennessee.
- ^ Flora of Missouri
- ^ a b c "Flora of the Southern and Mid-Atlantic States".
External links
edit
Media related to Silphium asteriscus at Wikimedia Commons
Data related to Silphium asteriscus at Wikispecies
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